Hydrodesulfurization of Dibenzothiophene over Cobalt−Molybdenum Nitride Catalysts

Abstract

Molybdenum nitride (γ-Mo2N) and Co-promoted molybdenum nitrides (Co−Mo−N) catalysts with high surface area have been prepared from the reaction of MoO3 and Co−Mo oxides with N2−H2 and characterized by XRD and BET. The results of measurement of hydrodesulfurization(HDS) of dibenzothiophene(DBT) supported the following conclusions: (1) γ-Mo2N and Co−Mo−N have higher HDS activity and selectivity for C−S bond breakage in dibenzothiophene; (2) different pretreatment conditions affect the HDS activity and selectivity; (3) the HDS activity of the γ-Mo2N is significantly improved with the addition of a Co promoter.